Automatic brake for talking machines



' mm, 2,, R928 H. L. 11'. UCKLE AUTOMATIC BRAKE FOR TALKING MACHINES 5 Sheets-Sheet 1 Filed Dec. 28, 1927 -1 WW1 T 1 Um. 2, W28. mwwz H. 11.. T. BUCKLE AUTOMATIC BRAKE FOR TALKING MACHINES Filed Dec. 28, 19'2"? s Sheets-Sheet 2 met. 2, $928.; mwmz H. LT IBUCIKLE AUTOMATIC BRAKE FOR TALKING MACHINES Filed Dec. 28, 1927 5 Sheets$het 3 Elli lt ntented lil Application filed December 28, 1927, serial lite. 243,164, and in Great Britain November 10, 1926;

This invention relates to improvements in automatic bralres for talking machines and in particular to automatic brakes of that typetvhich'embody a rotatable braking member, and a detent member adapted to engage said rotatable braking member to hold it in the cit position and to be moved, by a member moved by or in eonjunetionivith the sound arm, to allow said braking member to move into-the on position.

'lhe principal object oi the invention is to provide an automatic bralre ot this type vvlierein thebralring member is moved from the onlpositiontorender the turntable tree to rotate, by the manual operation oi the soundarm, instead of by the manipulation oi a separate bralrelever;

ill turther object oi the invention is to provide an automatiobralrewherein the braking member ismoved :ti'om the on position by the'manual operation oit thesound arm and wherein the sound arm, after beingmoved the distance necessary to set the bralringniemb'er in the off position, may be further moved in the same direction Without imposing' any strain upon the parts.

, According to the invention bralite. Withdrawing" means areprovided "which are adapted to co-operate with the brake member and the soundarm orv a member moved by or in conjunction therewith, whereby Withdrawal oft t 'ebrahing member from the stopping ill position may be edectedby manual operation otthe soundarm;

ilo-operation between said brake Withdravving means and the soundarm or member movinin conjunction therewith maybe arranged to cease aiterthe braking member .hasreachedtlie it'ully Foil position and before the soundarm has reachodthe limit of its range otmovement. v lt'n thepreterred torm'the bralrinn: member ire-moved trom the ear to the oil position and vice versa. alternately by successive movements ot the soundarm in one and the same direction The invent-ionis illustrated by Way of ex? ample in the accompanying drawings asapplied to-a-n automatic bralre tor a disc tallrh1 machine, the brake being ot the kind when the end of the'record is reached, in the reverse d rection to that in Winch it moves during playlng.

1 illustrates the positions of the partsduring the playing otthe machine.

Fig. 2 the positions when the brake is on andthe soundarm has been swung part of the Way outwards and the brake is about to be taken oil, and

Fig. 3 the positions when the sound box. is

[r two-armed detent member 6 is also piv-- otaily mounted at 19 on thebase plate 3 and this detent member 6 is normally urged in a clockwise direction by a spring 7 secured between a lug 8' on said detent member 6 and alug' 9 on the base plate 3.

@he end otthe detent member 6 engages a trip lever 10 pivotally mounted on the braking member l, and these two members 6 and 10 are held in engagementby a spring 11 connected between the trip lever 10 and the lug 9 on the base plate 3. llhis spring 11 also serves to rotate said braking member 1 intothe on position when the detent 6 is disengaged trom the trip lever by rotation of said detent 6 about its pivot in a counterclockwise direction.

The counterclockwise movement of the detent 6 is effected by an actuating lever 12 pivotally mounted at 13 on the baseplate, said lever 12 being rotated about its pivot by engagement with" a post Madepending from the soundarn'r 1-5 to the machine.

A: roclringpaivl 16 is pivoted at 31 on one end of the-actuating lever 12 and is rocked by the engagement of a pin 26 on said pawlvvith the end 27bit a member 28 arrangedover the actuating lever, to rotate therewith and'frictionally connectedwith the pivot 13in such a manner as to lag slightly behind lever 12When the direction of movement ot the latter is reversed. ll; pin on the end of pawl it away trom pin 26 engages in a slot 30 formed lever 1: n l c inov' it titl 16 slides during the playing of a record over l'atche-tteeth 17 formed on an arc-shaped part 18 of the end of the detent 6 remote from the braking member 1. hen the end of the record is reached a reversal of the direction of movement of the sound arm 15 is effected by suitable means such'as by the engagement of the stylus in an eccentric groove formed near the centre of the record and this is attended by a clockwise movement of the actuating lever12. The pawl 15 is rocked and its end engages and is held against backward movement relatively to the member 18 and a thrust is thereby imparted to the detent 6. The detent 6 is caused to move in a counter-clockwise direction about its pivot 19 and its opposite end is disengaged from the trip lever 10 on the braking member 1' whereby the latter is freed to rotate under the pull of spring 11 into the position where the friction pad 4 engages the turntable rim.

In accordance with the present invention a lever 20 is pivotally connected at one end 21 with the rotatable braking member 1 and is furnished intermediate its length with a slot 22 which engages over a pin 23 upstanding from the base plate 3 whereby said lever 20 is guided during its movements. The end of this slotted lever 20, remote from the braking member 1, is provided with a hook 24 which is adapted to be engaged by the suitably shaped extremity 29 of the actuating lever 12 when a given point in the movement of said actuatin lever 12 is reached during the manually effected outward movement of the sound arm 15 (see Fig. 2). Continued movement outwards of the sound arm 15 beyond this given point results in a pull being exerted by the end of the actuating lever 12 upon the hooked end 24 of the slotted lever 20 as a result of which the braking member 1 is rotated about its pivot 2 into the off position (Fig. 3 where it is retained by engagement of the end of the detent member 6 with the trip lever 10 on the braking member 1.

The rotation of the braking member 1 about its pivot 2 causes a combined rocking and sliding movement of the slotted lever 20 with regard to the guidepin 23 in slot 22 and the arrangement is such that when the braking member 1 has reached the off. position the hook 24L on the end of the slotted lever 20 moves from engagement with the end 29 of actuating lever 12 (see Fig. 3) so that though outward movement of the soundarm 15 is continued, no further pull is exerted by said actuating lever 12 upon-the braking member 1 and thus no strain'can be imposed upon the parts of the brake.

Whenthe brake is actuated to return to the on position by the engagement of the pawl 16 on the actuating lever 12 with the teeth 17 on the detent member 6 as above de scribed, the slotted lever 20 moves freely with the braking member 1, being caused, by virtue of the slot 22 and guide pin 23 to take up a position, where the hook 24. will, during the subsequent manual movement of the soundarm 15, be engaged by the end 29 of the actuating lever 12.

The duration of the period through which the hook 2d and the end 29 of actuating lever 12 are in engagement to move the braking member 1, may be determined by suitably shaping and positioning the slot 22 in the slotted lever 20 and if necessary one or both sides of the slot 22 may be shaped so that engagement ot' the shaped portion with the guide pin 23 serves to impart a quick rocking movement of the hooked end 24 of the lever into or out of the path of the end of the actuating lever 12.

What I claim is:

1. An automatic brake for talking machines comprising a rotatable brake member and a detent member adapted to engage said brake member to hold it in the off position and to be moved to allow said brake member to move into the on position, a sound arm, a member moved by said sound arm, and brake withdrawing means adapted to cooperate with the rotatable brake member and the member moved by the sound arm whereby withdrawal of the brake from the stopping position may be eifected by the manual operation of the sound arm.

2. An automatic brake for talking machines comprising a rotatable brake member and a detent member adapted to engage said brake member to hold it in the off position and to be moved to allow said brake member to move into the on position, a sound arm, a member movable by moving said sound arm in one direction for releasing said detent to allow the brake member to move into the on position, and brake withdrawing means adapted to cooperate with the rotatable brake member and the member moved by the sound arm, whereby withdrawal of the brake from the stopping position will be effected by a further operation of the sound arm in the same direction as the movement causing release of the detent.

3. An automatic brake for talking machines comprising a movable brake member, means tending to move the brake member into its on position, means for holding the brake member in its off position, means for withdrawing the brake member from its on position to its off position, a sound arm, and connections between the sound arm and the holding means and said withdrawing means so arranged that successive movements of the sound arm in one direction will release the holding means and then operate the brake withdrawing means.

4. An automatic brake for talking machines comprising a movable brake member and a detent member adapted to engage said brake member to hold it in the off posireeaeva t tion, and to be moved to allow said brake member to move into the on position, a sound arm, a member moved by said sound arm, and a lever pivotally mounted at one end on the movable brake member and having a hook on the other end adapted to lie in the path of movement of the member moved by the sound arm, when the brake is in the on position.

5., An automatic brake for talking machines comprising a rotatable brake member and a detent member adapted to engage said brake member to hold it in the ofi position and to be moved to allow said brake member to move into the on position, a sound arm, a member moved by said sound arm, and brake withdrawing means adapted to cooperate with, the rotatable brake member and the member moved by the sound arm whereby Withdrawal of the brake from the stopping positionmay be effected by the manual operation of the sound arm, the cooperation of the brake withdrawing means With the member moved by the sound arm ceasing when the brake member reaches the tall 0% position, and before the sound arm has reached the limit of its range of movement.

6 An automatic brake for talking machines comprising a movable brake member and a detent member adapted to engage said of movement of the member moved by the sound arm, when the brake is in the on position and a pivotal guide for said lever so formed that the hooked end of the lever is moved into the path of movement of the member moved by the sound arm when the brake member is on and is moved out of said path when the brake member is OK.

In testimony whereof I have signed my name to this specification.

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